Ground lamp



FIG. 1 is a front right side top perspective view of the ground lamp showing my new design;

FIG. 2 is an inverted left side bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown on the drawings depict portions of the ground lamp that form no part of the claimed design. 

CLAIM The ornamental design for a ground lamp, as shown and described. 